Batteries, shore power and biofuel are at the core of Hurtigruten Groupâs large-scale green upgrade of the entire fleet of Hurtigruten Norwegian Coastal Express ships. The result: CO2 emissions will be reduced by least 25 %, and NOx emissions cut by 80 percent. In what is described as one of the largest environmental upgrades in the history of European shipping, all seven Hurtigruten Norwegian Coastal Express ships will undergo significant green upgrades by 2023. - The worldâs most beautiful voyage just got even better. We are combining the best available technical solutions and cutting CO2 emissions along the Norwegian coast with at least a quarter. And most importantly, we are laying the foundation for introducing new and even more efficient environmental solutions as they are developed, Hurtigruten Norwegian Coastal Express CEO Hedda Felin says.